Final answer:
Barbara's standard deduction in Oregon would be calculated as her earned income plus an additional $350, not exceeding the standard deduction amount for a non-dependent individual. Without the current tax year's data for Oregon, we cannot specify an exact figure.
Step-by-step explanation:
The question pertains to Barbara's standard deduction for Oregon tax purposes when filing as Married Filing Separately (MFS) and being claimed as a dependent on her parent's return, given her income sources of a part-time job and interest from a savings account. Based on the information provided, Barbara's standard deduction would be her earned income ($1900 from her part-time job) plus a standard $350, but not exceeding the standard deduction for someone who's not a dependent.
Since her total income is $2,100 ($1900 from a part-time job and $200 interest income), her standard deduction in Oregon would thus be the lesser of her earned income plus $350 or the standard deduction for a non-dependent. As individual standard deduction amounts vary each tax year and by state, the exact figure would need to match with Oregon's tax regulations for the specific year in question. Therefore, we cannot conclusively determine the exact answer without the current year's tax data for the state of Oregon.